Cough Syncope Due to Atrio-Ventricular Conduction Block

Daiji SAITO; Shigeru MATSUNO; Kiminori MATSUSHITA; Hikaru TAKEDA; Tatsuo HYODO; Shoichi HARAOKA; Akiharu WATANABE; Hideo NAGASHIMA

doi:10.1536/ihj.23.1015

Daiji SAITO, Shigeru MATSUNO, Kiminori MATSUSHITA, Hikaru TAKEDA, Tatsuo HYODO, Shoichi HARAOKA, Akiharu WATANABE, Hideo NAGASHIMA

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Keywords: Atrial fibrillation, A-V block, Tussive syncope

JOURNAL FREE ACCESS

1982 Volume 23 Issue 6 Pages 1015-1020

DOI https://doi.org/10.1536/ihj.23.1015

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Abstract

A case of cough syncope due to A-V conduction block of the heart is reported in this paper. A-V conduction block and lightheadedness were induced by coughing but not by an Aschner test, carotid sinus massage, Valsalva maneuver, pharyngeal stimulation, and stimulation of systemic baroreceptors. Permanent right-ventricular pacing completely abolished the patient's symptoms. The results suggest that hypersensitivity of a broncho-pulmonary reflex to coughing was responsible for the A-V conduction block and resulting syncopes.

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